std::basic_common_reference<tuple-like> (C++23) 确定tuple和tuple-like类型的公共引用类型 (类模板特化) std::common_type<tuple-like> (C++23) 确定tuple和tuple-like类型的公共类型 (类模板特化) std::formatter<std::tuple> (C++23) tuple的格式化支持 ...
__cpp_lib_tuples_by_type201304L(C++14)按类型(5-8)寻址元组 示例 运行此代码 #include <cassert>#include <iostream>#include <string>#include <tuple>intmain(){autox=std::make_tuple(1,"Foo",3.14);// 注意:std::get 会生成到 std::get<std::variant> 的错误链接usingstd::get;// 基于索引...
std::tuple_size<std::tuple> Defined in header<tuple> template<class...Types> structtuple_size<std::tuple<Types...>> :std::integral_constant<std::size_t, sizeof...(Types)>{}; (since C++11) Provides access to the number of elements in a tuple as a compile-time constant expression....
template< std::size_t I, class T > struct tuple_element; // not defined (1) (since C++11) template< std::size_t I, class T > struct tuple_element< I, const T > { using type = typename std::add_const<typename std::tuple_element<I, T>::type>::type; }; (2) (since C++...
}/// reference: http://zh.cppreference.com/w/cpp/utility/tuplestaticstd::tuple<double,char, std::string>get_student(intid){if(id ==0)returnstd::make_tuple(3.8,'A',"Lisa Simpson");if(id ==1)returnstd::make_tuple(2.9,'C',"Milhouse Van Houten");if(id ==2)returnstd::make_tup...
std::tuple是c++11提供的新模板类,在很多流行语言都有对应的实现,一般翻译为元组。使用它可以把多个不同类型的变量组合成一个对象。 简单示例 以下是std::tuple的简单示例(来源:https://en.cppreference.com/w/cpp/utility/tuple) #include<tuple>#include<iostream>#include<string>#include<stdexcept>std::tuple...
Defined in header<tuple> template<class...Types> classtuple; (since C++11) Class templatestd::tupleis a fixed-size collection of heterogeneous values. It is a generalization ofstd::pair. If(std::is_trivially_destructible_v<Types>&&...)istrue, the destructor oftupleis trivial. ...
输出: score:3.8, name: 参考材料 https://en.cppreference.com/w/cpp/utility/tuple/tuple_cat 作者:半杯茶的小酒杯原文地址:http://www.banbeichadexiaojiubei.com/index.php/2020/10/05/c11%E6%96%B0%E7%89%B9%E6%80%A7-stdtuple/ 0 分享2020-10-06%s...
在cppreference 站点上检查 std::tuple 的构造函数时,我遇到了下面定义的移动构造函数,该构造函数在 C++23 中可用。 template< class... UTypes > constexpr tuple( const tuple<UTypes...>&& other ) 这里, constexpr表示如果可能的话,可以在编译时处理构造函数。然而,参数是 const,这不是让移动语义变得...
en.cppreference.com/w/c 重载std::tuple_size, std::tuple_element. 并且提供ADL的get<index>. 2022-09-12 回复喜欢 凌人 给个赞,看了后觉得std的tuple在内存布局上存在不一致性(尽管大多时候并没有什么鬼影响),和普通结构体以及求组的元素排列顺序相反,强制转换时会出问题 2021-04-02 回复...